Juventus defender Giorgio chiellini says with the right preparation you can handle CR7 but believes lionel messi is pretty much unstoppable. Chiellini was underlining how important it is to study opponents inorder to keep them quiet but acknownledged it takes something special to hault the barcelona ace in his tracks. He explained that knowing your opponent both on team and an individual level helps you understand his characteristics, strenght and weaknesses. "When you mark Cristiano Ronaldo, you always try to make sure he does not get the ball to his RIGHT FOOT. When u are marking messi, you better start praying..." Chiellini remarked.